Product Description
Load Wheel Assembly
Specifications: 3.250 inch diameter x 4.190 inch width (3.250" x 4.190" | 3.25 x 4.19 wheel | 3-1/4 x 4.19 | 82.55mm x 106.43mm)
Specifications
Wheel Dimensions
| Material | Cushothane XL |
| Outside Diameter | 3.25 |
| Inside Diameter | 1.875 |
| Width Side to Side | 4.19 |
| Bore Depth | 1.18 |
| Hub Width | 4.19 |
| Bore Outside Diameter | 2.0467 |
Frequently Asked Questions
Q: What is the difference between SU 621-A and SU 621?
A: The SU 621 is the wheel only. The SU 621-A is a complete load wheel assembly with the wheel mounted on a hub with bearings and fasteners. Order SU 621-A if you need a ready-to-bolt-on replacement. Order SU 621 if you already have a hub assembly and only need the wheel component.
Q: Are the SU 621-A dimensions the same as the SU 621?
A: Yes. The wheel portion of both is 3.25 inches diameter and 4.19 inches wide. The bore dimensions are identical. The SU 621-A simply includes the pre-assembled hub and bearings, so overall assembly width may be slightly different. Verify mounting bolt pattern before purchase.
Q: Can I install the SU 621-A myself, or do I need a technician?
A: The SU 621-A can be installed with basic tools and a jack. Remove the old wheel assembly, bolt on the new SU 621-A, and tighten bolts in a crisscross pattern to avoid skewing. Do not tighten one bolt fully before moving to the next. Always use safety stands under the truck and never work underneath a truck supported only by a jack.
Q: Is the SU 621-A assembly sealed or does it require maintenance?
A: The SU 621-A has a sealed 20 mm precision bearing and does not require regular greasing under normal warehouse use. Inspect monthly to ensure bolts remain tight and the wheel spins freely. If the wheel binds or does not spin smoothly by hand, the bearing or hub may be damaged and the assembly should be replaced.
Q: What truck models are compatible with the SU 621-A?
A: The SU 621-A fits electric lift trucks and pallet jacks with a matching hub bore and bolt pattern. Check your truck model and serial number against our compatibility list, or measure your current wheel bore and bolt spacing to confirm fit. Incorrect fitment can damage the truck frame and cause safety hazards.